Booking over WhatsApp, straight into Microsoft Outlook. With Arbol, with no manual copying.
How it works
The patient writes on WhatsApp.
Arbol checks availability in Microsoft Outlook and offers times.
It creates the event in Microsoft Outlook and confirms on WhatsApp.
If they reschedule, it moves it in Microsoft Outlook and lets them know.
What each one is
Customer messaging
WhatsApp
WhatsApp Business is WhatsApp's (Meta) offering for companies, and it comes in two versions. The WhatsApp Business app is free and built for small businesses: a business profile, a product showcase and automated replies, with limited customization and integration. The WhatsApp Business Platform is for medium and large businesses: it gives API access to message customers at scale, connect other systems and send template messages, which are billed per message.
Confirm appointments, send reminders and answer patient questions on the channel they already use.
WhatsApp has more than 3 billion monthly users, according to Mark Zuckerberg on Meta's first-quarter 2025 earnings call. Source: techcrunch.com (opens in a new tab)
Meta publishes the WhatsApp Business Platform Cloud API, built on the Graph API, to send text, media, interactive and template messages and to receive incoming messages and delivery statuses by webhook.
WhatsApp integrationEmail and calendar
Microsoft Outlook
Outlook is Microsoft's email and calendar, and it also manages contacts. It is part of Microsoft 365, where mailboxes live in Exchange Online, and it also works with personal Microsoft accounts. The new Outlook for Windows is free and requires no subscription.
Run email and calendars for clinical and admin staff, and send appointment invitations to patients.
Exchange Web Services (EWS) is disabled by default in Exchange Online starting October 1, 2026, and shuts down completely on April 1, 2027; Microsoft directs developers to migrate their apps to Microsoft Graph. Source: techcommunity.microsoft.com (opens in a new tab)
Microsoft Graph is Microsoft's REST API for Outlook: it can read, send and organize email, create and update events, check availability and receive change notifications.
Microsoft Outlook integration
Questions
Does it work with several Microsoft Outlook calendars?
Yes: the assistant checks the availability of every Microsoft Outlook calendar your organization connected before offering a slot.
Do WhatsApp or Microsoft Outlook endorse Arbol?
No. WhatsApp and Microsoft Outlook are trademarks of their owners and do not sponsor or endorse Arbol. Arbol works on your organization's side, with the accounts and processes you already have with each.
What happens to patient data?
They are health data, sensitive under your country's data protection law: processed for a stated purpose, with the patient's authorization and with encryption and isolation per organization. Every conversation is recorded and exportable.
Trademarks and logos belong to their owners. WhatsApp and Microsoft Outlook do not sponsor or endorse Arbol. All integrations · Arbol's API
Let's look at WhatsApp and Microsoft Outlook in your operation.
A 30-minute demo with your team: how you work today, what we connect first and how long it takes. You leave with a written proposal.